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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\fusion\container\list\cons.hpp
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/*============================================================================= Copyright (c) 2005 Joel de Guzman Copyright (c) 2005 Eric Niebler Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) ==============================================================================*/ #if !defined(FUSION_CONS_07172005_0843) #define FUSION_CONS_07172005_0843 #include <boost/fusion/support/detail/access.hpp> #include <boost/fusion/sequence/intrinsic/begin.hpp> #include <boost/fusion/sequence/intrinsic/end.hpp> #include <boost/fusion/iterator/next.hpp> #include <boost/fusion/iterator/deref.hpp> #include <boost/fusion/container/list/cons_iterator.hpp> #include <boost/fusion/container/list/detail/begin_impl.hpp> #include <boost/fusion/container/list/detail/end_impl.hpp> #include <boost/fusion/container/list/detail/at_impl.hpp> #include <boost/fusion/container/list/detail/value_at_impl.hpp> #include <boost/fusion/container/list/detail/empty_impl.hpp> #include <boost/type_traits/is_convertible.hpp> #include <boost/utility/enable_if.hpp> #include <boost/fusion/support/sequence_base.hpp> #include <boost/mpl/int.hpp> #include <boost/mpl/bool.hpp> #include <boost/mpl/or.hpp> namespace boost { namespace fusion { struct void_; struct cons_tag; struct forward_traversal_tag; struct fusion_sequence_tag; struct nil : sequence_base<nil> { typedef mpl::int_<0> size; typedef cons_tag fusion_tag; typedef fusion_sequence_tag tag; // this gets picked up by MPL typedef mpl::false_ is_view; typedef forward_traversal_tag category; typedef void_ car_type; typedef void_ cdr_type; nil() {} template <typename Iterator> nil(Iterator const& iter, mpl::true_ /*this_is_an_iterator*/) {} template <typename Iterator> void assign_from_iter(Iterator const& iter) { } }; template <typename Car, typename Cdr = nil> struct cons : sequence_base<cons<Car, Cdr> > { typedef mpl::int_<Cdr::size::value+1> size; typedef cons_tag fusion_tag; typedef fusion_sequence_tag tag; // this gets picked up by MPL typedef mpl::false_ is_view; typedef forward_traversal_tag category; typedef Car car_type; typedef Cdr cdr_type; cons() : car(), cdr() {} explicit cons(typename detail::call_param<Car>::type car) : car(car), cdr() {} cons( typename detail::call_param<Car>::type car , typename detail::call_param<Cdr>::type cdr) : car(car), cdr(cdr) {} template <typename Car2, typename Cdr2> cons(cons<Car2, Cdr2> const& rhs) : car(rhs.car), cdr(rhs.cdr) {} cons(cons const& rhs) : car(rhs.car), cdr(rhs.cdr) {} template <typename Sequence> cons( Sequence const& seq , typename disable_if< mpl::or_< is_convertible<Sequence, cons> // use copy ctor instead , is_convertible<Sequence, Car> // use copy to car instead > >::type* dummy = 0 ) : car(*fusion::begin(seq)) , cdr(fusion::next(fusion::begin(seq)), mpl::true_()) {} template <typename Iterator> cons(Iterator const& iter, mpl::true_ /*this_is_an_iterator*/) : car(*iter) , cdr(fusion::next(iter), mpl::true_()) {} template <typename Car2, typename Cdr2> cons& operator=(cons<Car2, Cdr2> const& rhs) { car = rhs.car; cdr = rhs.cdr; return *this; } cons& operator=(cons const& rhs) { car = rhs.car; cdr = rhs.cdr; return *this; } template <typename Sequence> typename disable_if<is_convertible<Sequence, Car>, cons&>::type operator=(Sequence const& seq) { typedef typename result_of::begin<Sequence const>::type Iterator; Iterator iter = fusion::begin(seq); this->assign_from_iter(iter); return *this; } template <typename Iterator> void assign_from_iter(Iterator const& iter) { car = *iter; cdr.assign_from_iter(fusion::next(iter)); } car_type car; cdr_type cdr; }; }} #endif
cons.hpp
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